2001133817 has 8 divisors (see below), whose sum is σ = 2013848040. Its totient is φ = 1988444160.

The previous prime is 2001133811. The next prime is 2001133819. The reversal of 2001133817 is 7183311002.

It can be written as a sum of positive squares in 4 ways, for example, as 281870521 + 1719263296 = 16789^2 + 41464^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001133817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001133811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173717 + ... + 184877.

It is an arithmetic number, because the mean of its divisors is an integer number (251731005).

Almost surely, 2^2001133817 is an apocalyptic number.

It is an amenable number.

2001133817 is a deficient number, since it is larger than the sum of its proper divisors (12714223).

2001133817 is a wasteful number, since it uses less digits than its factorization.

2001133817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12283.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 2001133817 is about 44734.0342133369. The cubic root of 2001133817 is about 1260.1590915688.

Adding to 2001133817 its reverse (7183311002), we get a palindrome (9184444819).

The spelling of 2001133817 in words is "two billion, one million, one hundred thirty-three thousand, eight hundred seventeen".